Does each module have its own memory for storing fault codes? Or are they stored in a central location and just sorted my module when accessing through INPA?
If that's too broad of a question to answer (if say it can vary by module, or by generation of vehicle); I'm specifically interested in the transmission codes on a ZF 6HP19 in a 2006 E61 530xi.
The reason I'm asking, is I bought a car that's had the transmission replaced, and I'm still having issues. In pulling the codes (both EM and IM) via INPA, I got odometer readings for each instance of the code, plus other information such as trans temp, torque load, input/output shaft RPM, etc. This assumes of course I have translated the German correctly, this is my first time really using INPA. In any case, I have mileage readings that correspond closely with the times I was driving and it went into limp mode. But I ALSO have codes with mileages the chassis has yet to reach. Is that a sign the codes are old, likely from the car the transmission originally came from, and it was having issues even then? That only way that would be possible is if the trans related codes were stored in the memory of the transmission itself, hence this post. Also not sure if that module physically resides in the transmission, or is in the chassis.
The car currently has 110,243 miles (177,419 km), which has me suspicious about the italicized entries. I was told the trans that was put in was ~60k miles, looking at this I'm wondering if it doesn't mean that wasn't at all the case, AND that it wasn't healthy in the first place.
Error Type Odo. (km) miles Code Description EM 176,840 109,883 4F83 Ratio Monitoring Clutch C EM 176,840 109,883 4F83 Ratio Monitoring Clutch C IM 176,856 109,893 5118 EGS Reset IM 176,856 109,893 5119 Reset in Bosh SW-Part IM 176,856 109,893 5119 Reset in Bosh SW-Part IM 176,856 109,893 5119 Reset in Bosh SW-Part EM 176,984 109,973 4F96 Gear Transmission Ratio C-E EM 176,984 109,973 4F85 Ratio Monitoring Clutch E IM 177,000 109,983 4F86 Transmission Ratio Symptom Speed Monitoring EM 177,400 110,231 4F83 Ratio Monitoring Clutch C IM 177,400 110,231 4F80 Ratio Monitoring Symptom Gear Monitoring IM
196,336 121,997 5118 EGS Reset IM 196,400 122,037 5118 EGS Reset IM 197,528 122,738 4F86 Transmission Ratio Symptom Speed Monitoring IM 205,936 127,963 4F86 Transmission Ratio Symptom Speed Monitoring IM 237,976 147,871 4F80 Ratio Monitoring Symptom Gear Monitoring IM 237,984 147,876 4F80 Ratio Monitoring Symptom Gear Monitoring IM 239,728 148,960 5113 DME Forced Control IM 239,856 149,040 5113 DME Forced Control IM 265,024 164,678 5113 DME Forced Control
In case it helps anyone else, I got confirmation from CTSC that the transmission module is in fact inside the transmission (specifically the valve body / mechatronic) and does store its own error codes.
"The computer is inside the transmission, it is part of the trans valve body called mechatronic.
Depends on what tool you use to read the error memory it might not read the faults and the fault details (mileage) correctly."
Now I wish I could just find an easy way to read the data on a transmission before I go through the trouble of putting it in the car!
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